Free Public Library of Petaluma
Also known as: Old Carnegie Library; Petaluma Historical Library and Museum
Why it's listed
Petaluma's Old Carnegie Library is a 60-by-60-foot, two-story building on a corner lot in downtown Petaluma. Designed by local architect Brainerd Jones, it is wood-framed and faced with locally quarried sandstone and Alameda pressed brick in cream and buff tones. Its pedimented portico has four tall stone columns with Corinthian capitals, and the interior centers on a large leaded stained glass dome, locally believed to be the largest free-standing dome of its kind in California. Douglas fir paneling, a gallery and a double staircase fill the interior. Funded by a Carnegie grant, the cornerstone was laid in 1904 and the library opened in 1906, weeks after the earthquake. It served as the town's only library until the 1970s. Alterations have been minor, including removal of roof balustrades in the 1930s. After restoration, it reopened in 1978 as a historical library and museum. It is significant for its architecture and its role in the town's civic life.
Significance in brief: The nomination argues the building is one of Petaluma's finest public buildings and a well-preserved example of Neo-Classical Revival style (Criterion C). It also served as the town's only library from 1906 until the 1970s, and was funded by a Carnegie grant (Criterion A).
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 88000925, listed June 23, 1988. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | 20 Fourth St., Petaluma |
|---|---|
| County | Sonoma County |
| Listed | June 23, 1988 |
| Reference number | 88000925 |
| Resource type | Building |
| Period of significance | 1906-1938 |
| Architect / builder | Jones, Brainerd |
| Architectural style | Neo-Classical Revival |
| Criteria |
|
| Areas of significance | Architecture, Social History |
| Level of significance | Local |
| Status (as stated in the nomination) | Now used as the Petaluma Historical Library and Museum, which opened in 1978 after interior restoration; owned by the City of Petaluma. |
| Acreage | 0.4 |
| Coordinates | 38.23262, -122.63981 (NPS GIS) |
What listing means for this property
For a publicly owned building or structure, listing mainly matters when federal funds, permits or licences are involved: projects then go through Section 106 review so effects on the property are considered. Listing also strengthens applications for preservation grants and, for leased income-producing uses, can enable the federal rehabilitation tax credit.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 88000925.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5500020
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.